Question: When did Charlie Chaplin and Oona O'Neill get married?
Paraphrase: What is the date that Charlie Chaplin and Oona O'Neill's got married?
SPARQL (Wikidata): SELECT ?value WHERE { wd:Q882 p:P26 ?s . ?s ps:P26 wd:Q137808 . ?s pq:P580 ?value}